21482182512 has 90 divisors (see below), whose sum is σ = 69935852688. Its totient is φ = 6137764416.

The previous prime is 21482182507. The next prime is 21482182517. The reversal of 21482182512 is 21528128412.

It is a happy number.

21482182512 is a `hidden beast` number, since 2 + 1 + 48 + 21 + 82 + 512 = 666.

It is an interprime number because it is at equal distance from previous prime (21482182507) and next prime (21482182517).

It is a super-2 number, since 2×21482182512² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21482182517) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1515208 + ... + 1529319.

Almost surely, 2^21482182512 is an apocalyptic number.

It is an amenable number.

21482182512 is an abundant number, since it is smaller than the sum of its proper divisors (48453670176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21482182512 is a wasteful number, since it uses less digits than its factorization.

21482182512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044555 (or 3044539 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The spelling of 21482182512 in words is "twenty-one billion, four hundred eighty-two million, one hundred eighty-two thousand, five hundred twelve".